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【单选题】
家长教育子女没有固定的教育模式,教育场所和教育时间也不固定,这体现了家庭教育的性质是( )A.
私人性
B.
非正规性
C.
终身性
D.
永久性
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皮皮学刷刷变学霸
举一反三
【单选题】A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
A.
annular blowout preventer
B.
annulus
C.
accumulator
D.
automatic choke
【多选题】In a ( ) reservoir, fluid flows radially from the reservoir to the wellbore.
A.
Homogeneous-acting
B.
Heterogeneous-acting
C.
polyhedral
D.
cylindrical
【判断题】For the damaged well, the effective wellbore radius become smaller than actual wellbore radius, and the skin factor value is negative.
A.
正确
B.
错误
【判断题】科学社会主义从理论到实践,从苏联一国实践到十几个社会主义国家的实践,丰富了人们对社会主义的认识,这就是社会主义思想认识中的第二次历史性飞跃。( )
A.
正确
B.
错误
【单选题】Which of the following situations indicates that the wellbore has been damaged? ( )
A.
Ks>K,S<0< /div>
B.
Ks>K,S>0
C.
Ks
D.
K s 0
【简答题】如何认识和评价柏拉图的理想国？
【简答题】Following shut-in at the suce, fluid continues to flow from the reservoir into the wellbore, compressing the gas and liquid already in the wellbore and storing more fluid. This continued production...
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